A. By default notification icon is positioned on bottom-left,you can change notification icon position to bottom-right by replacing push-icon-left class with push-icon-right .

Q. How to change color of subscribe/unsubscribe button?

A. You can change subscribe/unsubscribe button color by changing background-color of subscribe-btn class.

Q. Can we remove unsubscribe button?

A. No, you can't remove unsubscribe button from AMP Web push page because it is recommended by google for better user experiences, but yo can hide this on your page by replacing show-unsubscribe to hide-unsubscribe class.